Test library
Glycohemoglobin Testing
A blood test that measures glycated hemoglobin to reflect average blood glucose over the previous two to three months, supporting diabetes monitoring.
Order Hemoglobin A1C Testing
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Hemoglobin A1C Testing- Typical turnaround
- 1-3 business days
- Starting price
- From $29
- Results
- Confidential, online
Quick answer
This test measures hemoglobin A1c, a form of hemoglobin coated with glucose, which reflects average blood sugar over roughly the previous two to three months. It is used to monitor diabetes control and can also support screening. A healthcare provider interprets the result with the clinical picture.
What this test measures
Glucose in the bloodstream can attach to hemoglobin inside red blood cells, forming glycated hemoglobin. Because red blood cells live for about three months, the A1c level reflects the average glucose exposure over that period rather than a single moment. This makes it a practical marker for longer-term blood sugar trends.
The test requires a blood sample, typically from a routine venous draw, and does not need to be collected at a particular time of day. Laboratories report the A1c percentage and often an estimated average glucose value that translates the percentage into everyday units. Some reports include a note about hemoglobin variants that can affect the measurement.
People order this test to monitor a known diabetes diagnosis, to screen when risk factors are present, or to review how lifestyle and treatment plans are working over time. The result is educational information that a qualified healthcare provider uses to guide care, and it does not replace day-to-day glucose monitoring when that is recommended.
- Hemoglobin A1c percentage
- Estimated average glucose (eAG)
- Glycated hemoglobin fraction
- Total hemoglobin
- Hemoglobin variant interference check
- Fasting glucose when ordered with a metabolic panel
Why people order this test
- Monitor long-term blood glucose control in diabetes
- Screen for elevated average glucose when risk factors exist
- Assess how diet and activity changes affect glucose over time
- Provide a stable measure that does not depend on one day
- Track trends alongside a clinician's care plan
How to prepare
Fasting is not required, and the sample can be collected at any time of day. A routine blood draw is performed at a laboratory. Follow the collection instructions provided by the laboratory.
Understanding your results
Results are typically available within one to three business days. The percentage reflects average glucose over the prior months, and a healthcare provider interprets it against agreed targets for each person's situation.
Glycohemoglobin Testing by state
Alabama
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Alaska
Glycohemoglobin Testing across Alaska.
Arizona
Glycohemoglobin Testing across Arizona.
Arkansas
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California
Glycohemoglobin Testing across California.
Colorado
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Connecticut
Glycohemoglobin Testing across Connecticut.
Delaware
Glycohemoglobin Testing across Delaware.
Florida
Glycohemoglobin Testing across Florida.
Georgia
Glycohemoglobin Testing across Georgia.
Hawaii
Glycohemoglobin Testing across Hawaii.
Idaho
Glycohemoglobin Testing across Idaho.
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Frequently Asked Questions
Does A1c require fasting?
No. It reflects average glucose over months, so a fasting sample is not necessary.
How far back does the result look?
It reflects roughly the previous two to three months, based on the lifespan of red blood cells.
Can the test be affected by anemia?
Yes. Conditions that change red blood cell lifespan or hemoglobin type can affect the reading, so share your health history.
Is A1c used for diagnosis?
It can be used in screening and diagnosis when a healthcare provider determines it is appropriate for the situation.
Should I stop taking my medications first?
No. Do not change medications on your own; ask your healthcare provider about any preparation questions.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.